How do I care for and clean the removable cover?

The cover is removable, and Chirofoam recommends dry cleaning it rather than machine washing to prevent shrinking. Use a mattress protector to keep the cotton top and denim borders clean, and spot-clean spills promptly. The cover has a non-skid bottom that helps the mattress stay put on its base. Rotating the mattress head-to-foot periodically also evens out wear on the extra-firm surface and helps it hold its feel over the years.